Plotting u+ versus y+
I would like to plot u+ against y+ to have the velocity profile near the walls.
Did anybody already try that? Normally this shouldn't be too difficult but I don't know how I cant get certain values :
y+ = U_tau * y / nu
u+ = U/U_tau
with U_tau = sqrt (Tau_wall / rho)
I think that :
Since I'm in a incompressible case rho & nu are no problem
Tau_wall : wallShearStress command in openfoam
y : I can create it myself if needed
U : How can i get it as U(y) (since it's what I need for the plot) ?
Thanks for your help
That's my problem too.how can I achieve the first grid data from wall?
On this forum you will be able to find some threads about calculating yPlus. But I assume you can also do it in a post-processing step when you extract (y,u) data from your case?
As Bernhard mentioned, there are threads where this is discussed. Try for instance the thread http://www.cfd-online.com/Forums/ope...-testcase.html
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